Boiler



Aug. 20, 1935. s K. SMITH El" AL 2,912,144 BOILER Filed Oct. 20, 1933 2 Sheets-Sheet 1 JP0$67 Z 62 67 05.9

Aug. 20, 1935; s. K. SMITH ET AL 2,012,144

- BOILER Filed Oct. 20, was 2 Sheet-Sheet 2 Y Patented Aug. 20, .1935

Stanley K.- Smith, Glenn slammed Ram 1 V Cross,Westfield, Mass, ass ignelfs to The H. B. e Smith Company,Westfieli Mass, acorporation of Massachusetts thgs, ejected sometimes is'carriedinto the1transmiss n: l n s an ist i e 1 it mfieh k h j system, and/or accumulates mslngsf'which -ii1 ter-" fere with the proper transfnissionand distribution' l A furtherdifficulty-experienced with this-type heil h n u for id r I a i a h a e u p uei the ae 'iha flfihe sad or heating drum through which thesupplypipes extend, is attached to one side of the boilerphly,

and as the he at supplied, to 'the heating drum is furnished solely'or*principa11yby the tubes at that-side, they become relatively cool in comparison with the tubes on the opposite side'of the boiler. When the'fire is controlled-automatically in accordance with the temperature of eitherthe" hot water supply or' 'the heater, the

2 at one side of the boiler are cooled off rela-j tively to those in the'oppositeside andthelatc ter are oiten exposed "to excessive heat andplodnc'e stearn' at a time when it is no tdesircdas, for example, when the boiler is; u'secl 'i'n' the summertime merely for' heating the water supply. Hence the efficiency of the unit and the desired 7 uniformity of operation is appreciably impaired construction, and reliable and eificient in' operaandthe; cost of: heating the hot Water supplyis gi'eatlyincreased. s I 1 vide' av sectio nalboiler which: is of' economical tion, and when overcomes theaforementioned objectionable features and" deficiencies inherent in the prior-types. "Further objects relateft'o theconstructionand mode or operation of our'im-j provedboileria'nd will apparent from a cons'ideration of the following description and accompanying drawings which exemplify one embodhnntof th'einvention chosenif or' the purpose of iilustratiom 1,

- Inthe-drawi-ngsr H "fl 'i'g; l-is' a iront el'evation, with parts broken away and shown in sectionfof ou improved boile principalobiect of the inv ention is, to ira-f @Pfl c tion October 20, 1933; S i 694322 Fig.2 is a top plan view'thereof File, 3 is a'iragme'ntary side elevation with par-ts broken away and shown in section;

Fig. 4 is an enlarged section on the line 4-4"of Fig; 1'; and A V I I F Fig. 5 is an enlarged section on the line 5--5" of Fig.1;

*Referring to'Figs. 1;to 3, the boiler "shown therein comprises a series "of aligned sections'rlfl seciired in fixed position by any; suitable means an'd'n ounted on a pair of bracketsl II which may also providea support for the grate (not shown) if 7 a gra te' is'to'be used; I Each of the sections I'O (except the "rear section Ill is of 'similarcom struction "comprising anouter water tube which is substantially U shaped, having -acentral horizontally extendingfportion i2 whichide'fiiies the top of' thesecti'on'a'nd provides thesteam liberating; chamber, and a pair-{of integral depending tubular'portions 'orw'ater legs designated. gener-' allyby'the numeralsfl l; and 7 l5; As shown in Figyfl the Water'legsl ijand- 15 define the side walls lot the boiler and 'arespaced apart a suf-' ficientedistance to; provide a space-F for the fire box? i c r "rticular embodiment the water legs 'l i and w lfi ,'-'each pair being connected at theirlowerends'bv tubes l6 and f1, respectively,

and intermediate theirends by tubes i8 I3 and i9; us Intermediate the horizontalportion f2 and the lo-Werends of the water legs' IW-and l5 are a plurality of spaced, vertically extending in 'n'er 'wate'r tubes'ill, 2!; 22, etc'., integrally waited at their upper ends with the horizontal portion E2. The lower ends of each of thefinner tubes are laterally deflected and, as shown in Fig.1; re'- spectively communicate with the adjacent tubes In accordance with the present invention" the intermediate portionspf the centralinner tubes 2!] and Zi are integrally united, or otherwise joined or coalesced, to -pro-videa single central; conduit {of enlarged cross section, as shown-in Fig; 5',' andf intermediate their ends the inner water tubes are interconnected with the water legs oftheouter tubes by'aseries of horizontally aligned tubula'n parts '28 which provide a trans Verse water way preferably extending fromone side ofthe boiler'to the otherfas shownin Figr-l. Ereferably, the constituent parts of each section j are integrally united and form a unitary casting as shown in Figs. 1, 4,-and 5,although it is tobe understood that the invention is not limitedto this feature as-it is obviousvthat the constituent E5.

parts may be constructed as individual units and assembled by brazing, welding or in any other suitable manner.

The transverse waterway and coalesced portions of the central tubes 20 and 2| provide a free and unobstructed communication between each of the inner water tubes and the diiferent parts of the outer water tube and thus cooperate to provide for a more active and efiicient circulation which is effective to increase the overload capacity of the boiler and furthermore to break up any water slugs which may form in the lower parts of any of the tubes, due to rapid evolution of steam when the bo-iler'is driven at high capacity. Hence, any tendency to force the water in the vertical parts of the inner water tubes upwardly in the form of jets is effectively overcome and consequently the delivery, of water into the system is avoided. Although the ways of the respective sections, as shown in Figs. 1 and 4, and each pipe maybe firmly held in fixed position by any suitable means such as, packing unions 3| which engage threaded apertures in the outer walls of the water legs I 4 and I5, When the boiler is used in the summertime for supplying hot water, each section, is provided with a pipe 30 extending through its transverse waterway so that undesirable steaming in any section is prevented. The discharge .ends of thepipes 30 are preferably connected with an outlet manifold 32 which may discharge into a supplytank (not shown) or may be directly connected with the hot water supply lines leading to the various parts of the'system, thus providing an instantaneous hot water service. The size of the 'manifold 32 preferably is proportioned to the number level of the water in each of the sections so as to provide for proper circulation of the water within the boiler tubes and a more efiicient heat transfer when the boiler is used solely for heating the domestic water supply. With this construction the necessity of providing the usual header or heating drums at one side of the boiler is dispensed with and consequently excessive heating of the water at one side of the boiler section is prevented. The heat absorbed by the pipes 30 is furnished by all the vertical tubes of each section, rather than those at one side only, and hence the temperature of the water in the different parts of each section is substantially equalized. This arrangement is particularly adbe kept below its boiling point and yet be high enough to furnish sufficient heat to insure an ample supply of hot water.

The top walls of the sections areprovided with steam supply nipples 34 which are threaded into the inlet ports provided in the base 35 of an overhead supply drum 35, the top of the drum being furnished with the usual discharge ports 3Twith which the steam mains or risers may be A connected. A drain pipe 38 connects the rear end the lower ends of the water legs l4 and I5 by nipples 40.

The upper ends of the nipples 34 project a substantial distance above the floor of the supply drum 36 so that any condensate in the risers and drum collects on the floor of the drum, below the tops of the nipples, and is continually discharged through the drain pipe 38, the upper end of which terminates at or below the floor of the drum. Thus,- the tendency ,of the inrushing steam to carry moisture or condensate accumulating in the'supply drum into the delivery mains is largely eliminated, and the efiicient operatic of the'boiler is consequently enhanced.

While we have shown, and described one desirable embodiment of our invention, it is to be understood that the present disclosure is for the purpose of illustration only, and that various changes in shape, arrangement, and proportion of parts, aswell as the substitution of equiva- .municating witheach other, a series of horizontally disposed tubes-connected to said inner and outer tubesintermediate their ends and defining, a transverse waterway whichprovides a free and unobstructed communication between each of said inner and outer water tubes, and. means for heating a hot water supply comprisinga water supply conduit associated with said transverse water way so as to receiveheat from water circulating therethrough.

2. In a sectional boiler of'the class described, the combination with a section comprising an outer tube having a horizontally extending central portion providing the top of the section and vertically depending portions spaced apart so as to straddle the fire-box of the boiler, a plurality of spaced, vertically extending inner tubes disposed intermediate the lower ends of said vertically depending portions and below said hori- V zontally extending portion of said outer tube, the

upper and lower ends of said innertubes, having connections respectively with said horizontal portion and said depending portions of said outer tube, and transversely extending tubes connecting each of the inner and outer tubes and providing a transverse waterway, of a hot water supply conduit extending through the outer walls of said outer tube and through said water way.

3. In a sectional boiler of the class described, the combination with a section comprising an outer tube having a horizontally extending central portion providing the top of the section and vertically depending portions spaced apart so s 7 2,012,144 as to straddle the fire-box of the boiler, a' plurality of spaced, vertically extending inner tubes disposed intermediate the lower ends of said verintermediate their ends, the upper and lower ends of said inner tubes having connections respectively with said horizontal portionandsaid Water way,

depending portions of said outer tube, and horivzontally extending tubes connecting each ofthe inner and outer tubes andproviding a transverse water way which intersects sai'd adjoining portions of the central tubes, of a hot water supply conduit extendingfthroughout said transverse STANLEY K.'SMITH.

GLENN B.,CO WLES. ROBERT C. CROSS. 

